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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Preparation and characterization of phase-segregated vesicles of photopolymerizable diacetylene mixed with nonpolymerizable amphiphiles
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Preparation and characterization of phase-segregated vesicles of photopolymerizable diacetylene mixed with nonpolymerizable amphiphiles

机译：可光聚合的二乙炔与不可聚合的两亲物混合的相分离囊泡的制备和表征

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A mixture of sodium 1,2-di(hexadecyloxycarbonyl)ethanesulfonate (2C16S) with photopolymerizable 1,2-di(10,12- tricosadiynoyl)-sn-glycerol 3-phosphocholine (DTPC) in a 2:100 ratio was treated by modified thin-film hydration to give an aggregate which became polymerized giant vesicles (GVs) under irradiation at 254 nm. The autofluorescence of the GVs was analyzed with a confocal laser scanning microscope at the cross section, revealing a 3.8-μm diameter ring shape and the presence of a dark part of ca. 1 μm in the ring. When octadecylrhodamine B (RhB) as an amphiphilic fluorescence probe was added to the GV, the fluorescence of RhB was emitted from the whole ring. Therefore, phase segregation of 2C16S from DTPC was confirmed. Similarly, mixed vesicles of N,N-di(2-hexadecanoyloxyethyl)dimethylammonium iodide with DTPC were found to be 3.7-μm diameter phase-segregated vesicles with a dark portion of ca. 1 μm on the ring in the cross sectional image. On the other hand, DTPC vesicles mixed with 1,2-di(dodecyloxycarbonyl)ethanesulfonate, N,N-di(2- dodecanoyloxyethyl)dimethylammonium iodide, and N,N-di(2-tetradecanoyloxyethyl) dimethylammonium iodide formed sphere structures filling the inside of the vesicles. The segregation mechanism was explained by the difference in the main phase transition temperature of each amphiphile.
机译：1,2-二（十六烷基氧羰基）乙烷磺酸钠（2C16S）与可光聚合的1,2-二（10,12-三二十二碳酰基）-sn-甘油3-磷酸胆碱（DTPC）的混合物经改性处理薄膜水合得到聚集体，该聚集体在254 nm的辐射下变成聚合的大囊泡（GV）。用共聚焦激光扫描显微镜在横截面上分析GVs的自发荧光，发现直径为3.8μm的环形，并存在大约黑色的部分。环中1μm。将作为两亲性荧光探针的十八烷基罗丹明B（RhB）添加到GV中时，RhB的荧光从整个环中发出。因此，证实了2C16S与DTPC的相分离。同样，发现N，N-二（2-十六烷酰氧基乙基）二甲基碘化铵与DTPC的混合囊泡是直径为3.7μm的相分离囊泡，深色部分约为ca。横截面图中环上1μm。另一方面，DTPC囊泡与1,2-二（十二烷基氧羰基）乙烷磺酸盐，N，N-二（2-十二烷酰氧乙基）二甲基碘化铵和N，N-二（2-十四烷酰氧乙基）二甲基碘化碘混合形成球形结构在囊泡里面。通过两亲物的主相变温度的差异来解释偏析机理。

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